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Vishay General Semiconductor - Diodes Division SMBJ11CA-M3/52
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- Part No.:
- SMBJ11CA-M3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ11CA-M3/52.pdf
- Description:
- TVS DIODE 11VWM 18.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,189
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Product details
Overview
SMBJ11CA-M3/52 from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on signal and power lines. It features a 11 V standoff voltage (VWM), 12.2–13.5 V breakdown voltage (VBR) at 1 mA, 600 W peak pulse power (10/1000 µs), and clamps to ≤18.2 V at 33 A peak surge current - used in industrial sensor interface protection and telecom line surge suppression.
For engineers reviewing the SMBJ11CA-M3/52 datasheet, SMBJ11CA-M3/52 pinout, SMBJ11CA-M3/52 application, or SMBJ11CA-M3/52 equivalent, key selection criteria include bidirectional clamping capability, 18.2 V max clamping voltage at rated IPPM, M3 halogen-free RoHS compliance, and SMB package thermal performance with RθJA = 100 °C/W.
Technical Context
This TVS diode operates symmetrically in both directions, enabling robust protection of AC-coupled or differential signal paths without polarity concerns. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low leakage (<5 µA at VWM), while the 10/1000 µs waveform rating reflects real-world lightning and inductive-switching surge immunity.
The device achieves fast response time (<1 ns) and low incremental surge resistance, critical for limiting transient energy delivered to downstream ICs like RS-485 transceivers or microcontroller I/O pins. Thermal design leverages the SMB package's 20 °C/W junction-to-lead resistance and MSL Level 1 reflow compatibility up to 260 °C peak.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 11 V - maximum continuous reverse operating voltage before clamping begins; defines safe operating margin for 12 V nominal systems. |
| VBR (min/max) | 12.2 V / 13.5 V at 1 mA - tight breakdown window ensures predictable turn-on and avoids premature conduction during normal operation. |
| VC @ IPPM | ≤18.2 V at 33 A - clamping voltage limits stress on protected ICs; enables compatibility with 20 V absolute maximum ratings. |
| PPPM | 600 W - peak pulse power handling per 10/1000 µs waveform; supports IEC 61000-4-5 Level 3 (1 kV/2 Ω) surge testing. |
| IPPM | 33 A - peak surge current capacity; sufficient for 100 V surge into 3 Ω source impedance per standard test models. |
| TJ max | +150 °C - maximum junction temperature allows reliable operation in enclosed industrial enclosures with ambient up to +85 °C. |
| Package | SMB (DO-214AA) - standardized surface-mount outline with 5.59 mm × 4.06 mm footprint and 2.20 mm height; optimized for automated placement and thermal pad layout. |
Pinout & Package
Package: SMB (DO-214AA), bidirectional configuration - no polarity marking; symmetrical terminals with identical electrical behavior in either direction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient current path | Either terminal serves as input/output for bidirectional clamping; no cathode band; terminals interchangeable in PCB layout. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses (e.g., CAN, RS-485), and ungrounded power rails without polarity constraints. |
| 600 W peak pulse power | Withstands repeated 10/1000 µs surges up to 33 A - meets IEC 61000-4-5 and ISO 7637-2 automotive load-dump immunity requirements. |
| Halogen-free M3 construction | RoHS-compliant and halogen-free per JEDEC J-STD-201 Class 2 whisker resistance; suitable for green manufacturing and high-reliability industrial use. |
| MSL Level 1 rating | Supports lead-free reflow up to 260 °C peak without moisture-induced failure; eliminates bake-out requirement for production assembly. |
| Low clamping ratio (VC/VBR) | 1.42 typical (18.2 V / 12.85 V avg) - minimizes let-through energy and reduces risk of latch-up in protected CMOS inputs. |
Applications
| Industrial Sensor Interfaces | Telecom Line Protection |
|---|---|
|
Use Scenario: Protecting analog output lines (4–20 mA) and digital I/O (I²C, SPI) of pressure/temperature sensors in factory automation cabinets exposed to relay switching noise. IC Role / Device Role / Timing Role: Bidirectional TVS clamping element placed at connector entry point to shunt ESD and inductive kickback before reaching precision ADC or MCU GPIO. Use Value: Limits transient voltage to ≤18.2 V, preventing damage to 20 V-rated op-amps and ensuring <1 µs response preserves signal integrity during 8 kV contact ESD events. |
Use Scenario: Surge protection on POTS (Plain Old Telephone Service) line cards in VoIP gateways subjected to lightning-induced longitudinal surges. IC Role / Device Role / Timing Role: Primary differential-mode suppressor across tip/ring pair, coordinated with gas discharge tube (GDT) for common-mode handling. Use Value: Clamps 10/1000 µs surges up to 600 W without degradation, maintaining ≤1 µA leakage at 11 V to avoid affecting line impedance or DC bias conditions. |
| Automotive Body Control Modules | Consumer Power Adapter Inputs |
|
Use Scenario: Input protection for LIN bus transceivers and LED driver ICs in door module ECUs exposed to battery dump and load-switching transients. IC Role / Device Role / Timing Role: Secondary TVS stage after primary GDT or polymer PTC, providing fast-response clamping for sub-microsecond edges. Use Value: AEC-Q101 qualified variants available (HM3 suffix); this M3 version delivers same clamping performance with halogen-free materials for non-automotive but harsh-environment use. |
Use Scenario: Secondary-side overvoltage suppression on 12 V DC outputs of wall-mounted USB-C PD adapters during fault conditions. IC Role / Device Role / Timing Role: Fail-safe clamp preventing >20 V excursion into connected devices when secondary-side regulation fails. Use Value: 11 V VWM provides 10% margin above nominal 12 V output; 18.2 V VC ensures USB-PD sink ICs remain within absolute maximum ratings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ11CA-E3/52 | Same electrical specs; RoHS-compliant but not halogen-free (SnPb-free matte tin, no brominated flame retardants). | Preferred for commercial-grade cost-sensitive designs where halogen-free certification is not mandated. | Select E3/52 when halogen content is unrestricted and unit cost is prioritized over green material compliance. |
| SMAJ11CA-M3 | Lower 400 W PPPM, higher 23.2 V VC at 22.5 A; SMA package (smaller, higher RθJA = 140 °C/W). | Suitable only for lower-energy transients or space-constrained layouts where 600 W headroom is unnecessary. | Choose SMAJ11CA-M3 only if board area is critical and surge threat level is limited to IEC 61000-4-2 Level 4 (15 kV air), not Level 3/4 system-level testing. |
Compared with SMBJ11CA-E3/52, the M3 variant adds halogen-free compliance without sacrificing clamping performance or thermal capability; versus SMAJ11CA-M3, SMBJ11CA-M3 delivers 50% higher surge power handling and 21% lower clamping voltage - essential for protecting modern low-voltage ICs in industrial and telecom infrastructure.
Availability
SMBJ11CA-M3/52 is available at Aetrix Electronics and suitable for industrial sensor interfaces, telecom line protection, automotive body control modules, and consumer power adapter inputs requiring stable component supply and halogen-free material compliance.
Supply support for SMBJ11CA-M3/52 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMBJ series was developed for high-energy transient suppression in compact surface-mount formats, targeting industrial, telecom, and automotive subsystems where robustness, repeatability, and regulatory compliance (RoHS, AEC-Q101) are mandatory.
FAQ
What is the standoff voltage rating of SMBJ11CA-M3/52?
The SMBJ11CA-M3/52 has a maximum reverse standoff voltage (VWM) of 11 V, meaning it remains non-conductive under continuous reverse bias up to this level. This value is confirmed in the Vishay SMBJ5.0A–SMBJ188A datasheet (Document Number: 88392, Rev. 09-Jan-2024) and defines the upper limit of normal operating voltage before clamping initiates. The SMBJ11CA-M3/52 maintains <5 µA leakage at this voltage, ensuring minimal impact on circuit bias conditions.
Is SMBJ11CA-M3/52 bidirectional or unidirectional?
SMBJ11CA-M3/52 is a bidirectional TVS diode, indicated by the "CA" suffix per Vishay's naming convention. It clamps voltage transients equally in both directions, with identical VBR, VC, and IPPM specifications for positive and negative polarity. Unlike unidirectional variants (e.g., SMBJ11A), the SMBJ11CA-M3/52 has no cathode marking and is used where polarity is undefined or alternating - such as across differential data lines or AC power inputs.
What does the "M3" suffix mean in SMBJ11CA-M3/52?
The "M3" suffix in SMBJ11CA-M3/52 denotes halogen-free, RoHS-compliant construction using bromine- and chlorine-free molding compounds and matte tin-plated leads. It meets JEDEC J-STD-201 Class 2 whisker resistance and qualifies for green manufacturing standards. This differs from the "E3" suffix (RoHS-compliant but not halogen-free) and "HM3" (AEC-Q101 qualified + halogen-free). The SMBJ11CA-M3/52 is intended for commercial and industrial applications requiring environmental compliance without automotive qualification.
What is the maximum clamping voltage of SMBJ11CA-M3/52 at its rated surge current?
The SMBJ11CA-M3/52 clamps to a maximum of 18.2 V at its rated peak pulse current (IPPM) of 33 A, measured under the standard 10/1000 µs double-exponential waveform. This value is specified in the Electrical Characteristics table of the Vishay datasheet and represents the worst-case voltage seen by downstream components during a full-rated surge event. The SMBJ11CA-M3/52 achieves this with a clamping ratio of ~1.42 relative to its typical VBR, ensuring effective protection for 20 V-tolerant ICs.
Can SMBJ11CA-M3/52 be used in place of SMBJ11A-M3/52?
No - SMBJ11CA-M3/52 and SMBJ11A-M3/52 are functionally distinct: the "CA" version is bidirectional, while "A" is unidirectional with a cathode band and asymmetric forward conduction. Substituting SMBJ11CA-M3/52 for SMBJ11A-M3/52 in a DC-biased circuit may cause unintended conduction or fail to suppress positive-only transients effectively. The SMBJ11CA-M3/52 must only replace other CA-suffix parts unless circuit topology explicitly requires bidirectional symmetry, such as across transformer-coupled lines or floating grounds.
SMBJ11CA-M3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 11V
- Voltage - Breakdown (Min):
- 12.2V
- Voltage - Clamping (Max) @ Ipp:
- 18.2V
- Current - Peak Pulse (10/1000µs):
- 33A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMBJ11CA-M3/52 FAQ
1.How can I place an order for SMBJ11CA-M3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ11CA-M3/52 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SMBJ11CA-M3/52 reliable?
The price and inventory of SMBJ11CA-M3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ11CA-M3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ11CA-M3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ11CA-M3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ11CA-M3/52?
SMBJ11CA-M3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ11CA-M3/52 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SMBJ11CA-M3/52?
For technical support, including SMBJ11CA-M3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ11CA-M3/52 requirements.
6.How does Aetrix verify that SMBJ11CA-M3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ11CA-M3/52 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SMBJ11CA-M3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ11CA-M3/52?
All SMBJ11CA-M3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ11CA-M3/52, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SMBJ11CA-M3/52 part is unused and in its original packaging.
Return procedure for SMBJ11CA-M3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ11CA-M3/52 Tags
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